Support args to rspec through make test

As the documentation in `technical-foundation.md` says is supported.

Author: doshitan

template/{{app_name}}/Makefile.jinja

@@ -169,7 +169,7 @@ wait-on-db:
 ##################################################
 
 test: ## Run the test suite
-	$(RUBY_RUN_CMD) ./bin/rspec
+	$(RUBY_RUN_CMD) ./bin/rspec $(args)
 
 test-watch: ## Watch for file changes and run the test suite
 	$(RUBY_RUN_CMD) ./bin/bundle exec guard

template/{{app_name}}/bin/rspec

@@ -4,4 +4,4 @@
 # sets RAILS_ENV to development, we need to override it:
 export RAILS_ENV=test
 
-bundle exec rspec --format documentation
+bundle exec rspec --format documentation "$@"